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ErrorTracer: design error diagnosis based on fault simulation techniques

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2 Author(s)
Shi-Yu Huang ; Dept. of Electr. & Comput. Eng., California Univ., Santa Barbara, CA, USA ; Kwang-Ting Cheng

This paper addresses the problem of locating error sources in an erroneous combinational or sequential circuit. We use a fault simulation-based technique to approximate each internal signal's correcting power. The correcting power of a particular signal is measured in terms of the signal's correctable set, namely, the maximum set of erroneous input vectors or sequences that can be corrected by resynthesizing the signal. Only the signals that can correct every given erroneous input vector or sequence are considered as a potential error source. Our algorithm offers three major advantages over existing methods. First, unlike symbolic approaches, it is applicable for large circuits. Second, it delivers more accurate results than other simulation-based approaches because it is based on a more stringent condition for identifying potential error sources. Third, it can be generalized to identify multiple errors theoretically. Experimental results on diagnosing combinational and sequential circuits with one and two random errors are presented to show the effectiveness and efficiency of this new approach

Published in:

IEEE Transactions on Computer-Aided Design of Integrated Circuits and Systems  (Volume:18 ,  Issue: 9 )